Scanning and skimming are speed-reading techniques/strategies that use rapid eye movement and keywords to move quickly through text for slightly different purposes:
Scanning is reading rapidly to find facts or information to answer specific questions. Scanning often comes before skimming. For example, scanning can be used to determine if a resource (such as a news article) has the information you are looking for. Once the resource is scanned, it can then be skimmed for more detail (see below).
Skimming is reading rapidly to get a general overview of the material. Use skimming when previewing (reading before you read), reviewing (reading after you read), determining the main idea from a long section of text, or when trying decide which search results are worthy of a close reading.
Here are some strategies that you can use specifically for skimming news articles:
Scanning can help you rapidly find specific bits of information, and skimming will help you gain a general overview of the piece you're reading. But you may have had professors ask you to do a close reading of articles, book chapters, or other types of work. What does that mean?
Close reading involves being active and critical as you read. After you've read for comprehension, consider close reading as a way to delve deeper into the meaning, ask critical questions, and help you to develop a richer understanding of the text.
Here are some strategies that you can use to guide you as you embark on close reading a text:
(Adapted from the Purdue Online Writing Lab, Close Reading a Text and Avoiding Pitfalls.)